RE: THIS is how V-TEC works!!
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RE: THIS is how V-TEC works!! - 3/10/2007 11:34:50 AM
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johnb
Posts: 503
Joined: 1/2/2007
From: San Diego, CA
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quote:
ORIGINAL: Forty04
quote:
ORIGINAL: johnb
hey cool. look im glad you all want vtec. is there a way to make it kick in earlier!!!!!!!
yeah, but its pretty pointless to do so
dont mean to sound like an idiot but why wouldnt you want to make it kick in earlier?
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RE: THIS is how V-TEC works!! - 3/23/2007 1:09:29 PM
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lilBRANDON
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really cool im glad i know this now!!!! thank you
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power shift this!!!
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RE: THIS is how V-TEC works!! - 3/23/2007 1:10:58 PM
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lilBRANDON
Posts: 9
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have a ? could you mod the cam lift to be a lil higher for MORE?
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power shift this!!!
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RE: THIS is how V-TEC works!! - 3/23/2007 2:53:13 PM
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FlipHKD720
Posts: 7739
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From: Marquette, MI
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never heard of that but possibly ^
and as for adjusting wehn VTEC kicks in, there are VTEC controllers for those but those are usually recommended against. Honda already set VTEC to kick in at the point where your RPMs are high enouhg that your normal lobes are giving you their most power, so the extra lobe opens up another valve and allows even more air in, which means you get hte most power possible out of the stock lobes (i think  )
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RE: THIS is how V-TEC works!! - 3/26/2007 2:14:10 AM
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JohnnyTEAMDSR
Posts: 207
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How does turbo work then?
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RE: THIS is how V-TEC works!! - 3/26/2007 8:26:01 AM
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Forty04
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quote:
ORIGINAL: JohnnyTEAMDSR
How does turbo work then?
What do you mean? How does VTEC work with Turbo? Or how does Trubo work in general?
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RE: THIS is how V-TEC works!! - 4/6/2007 2:17:35 AM
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Impreza WRX
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quote:
ORIGINAL: johnb
quote:
ORIGINAL: Forty04
quote:
ORIGINAL: johnb
hey cool. look im glad you all want vtec. is there a way to make it kick in earlier!!!!!!!
yeah, but its pretty pointless to do so
dont mean to sound like an idiot but why wouldnt you want to make it kick in earlier?
If you look at the dyno chart, VTEC kicks in at a "notch" where the torque made from the low cam equals the torque made from the high cam. If you set it to turn on earlier, you will lose torque, but if you let it kick in later, you will get a sudden bump of torque. Neither one is good, because that can really screw you over when accelerating in a turn. At the very least an improperly tuned VTEC will make for a rough transition in power between low cam and high cam.
The only reason to change VTEC is 1: It's not tuned right and it engages rough, 2: Your torque curve changed from some kind of strange performance mod and it engages rough.
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RE: THIS is how V-TEC works!! - 7/23/2007 1:09:35 AM
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theblackpearl
Posts: 161
Joined: 7/23/2007
From: Colorado
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um, not always
i don't know about all hondas models and years, but some of the cars including the new Acura RSX Type-S has the VTEC kick in a little late after the torque has dropped a little in order to produce the VTEC kick that enthusiasts pine over oh so much.
in other words, using systems to change the vtec kick in point, such as the AEM EMS, will allow a professional tuner to find the correct position to allow the vtec to kick in so the torque curve truly is smooth
this was in an article of import tuner that i read, i'll try to find the issue it was in and post it for evidence as soon as i have time.
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RE: THIS is how V-TEC works!! - 7/23/2007 1:40:23 AM
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theblackpearl
Posts: 161
Joined: 7/23/2007
From: Colorado
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Actually, i may have been wrong with the AEM EMS being able to adjust the vtec point, i think you have to do something to it but i can't find out what.
anyways, it wasn't the RSX, but the TSX that was tested on the December 2006 issue #93 of Import Tuner. they sent back the ecu to have hondata reflash it to change it to the best cam profiles where they shifted the vtec point to 4850 instead of 6000 rpms. with this change, the torque line truely was smooth and linear. during the vtec kick in, there was a gain of 38 hp and 34 lb-ft but they mention that the drawback is that the driver can no longer feel nor hear the vtec activate, disapointing many drivers.
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RE: THIS is how V-TEC works!! - 7/23/2007 5:37:41 AM
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emaildaithai
Posts: 24
Joined: 4/12/2007
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there is such a thing as a v-tec controller. On the new type-r civics being imported into ireland from japan there is a built in v-tec controller. honda has stated that the controller was added due to the amount of aftermarket vtec controllers sold in japan for the previous type-r. I aint sure if the british or irish versions of the new type-r are fitted with v-tec controllers, but a mate of mine has one ordered so ill let yall know soon eneough.
The most common car to be fitted with aftermarket v-tec controllers are type-r integra's. the integra has a larger and more versitile engine which is also stronger allowing for variations in the switch to the higher cam.
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